NEET 2002 Biology question

A gene said to be dominant if : -

(1)It express it's effect only in homozygous stage
(2)It expressed only in heterozygous condition
(3)It expressed both in homozygous and heterozygous conditionCorrect
(4)It never expressed in any condition

Answer: (3)

Solution

A dominant allele is the one that expresses its phenotype both when it is present in two copies (homozygous, e.g. TT) and when it is present with a recessive allele (heterozygous, e.g. Tt), masking the recessive allele. Expression only in the homozygous state

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Question ID VK-089115